Simple interface using a rotary encoder

Projects Programming
1

Hi Guys!
I am trying to create a simple interface using a rotary encoder.
I would like to have basically 2 rows:

Pulse: #values
Delay: #values

I would want to "point" (using arrow key) and "select" using encoder button one of the two rows.
Upon then, using encoder button to change the values.

Until now I could only change the first row. I don't know yet how to code the selection.

I would be happy if you guys can assist.

Thanks.

Z

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F,16,2);
int val;
int encoder0PinA = 2;
int encoder0PinB = 3;
int encoder0Pos = 0;
int encoder0PinALast = LOW;
int n = LOW;
const int swPin= 4 ;//the number of the button
int pulse_time = 0;
byte cursor[8] = {
  0b10000,
  0b10000,
  0b01000,
  0b00110,
  0b01000,
  0b10000,
  0b10000,
  0b00000
};


void setup() {
  lcd.init();  // initialize the lcd
  lcd.backlight();
  lcd.setCursor(1,0);
  lcd.print("Pulse:");
  lcd.setCursor(1,1);
  lcd.print("Delay:");
  pinMode (encoder0PinA, INPUT);
  pinMode (encoder0PinB, INPUT);
  pinMode(swPin, INPUT);
  digitalWrite(swPin, HIGH);
  Serial.begin (9600);
  lcd.createChar(0, cursor);
}

void loop() {
  getEncoderTurn();
  if(digitalRead(swPin) == LOW)
  {
    pulse_time = getEncoderTurn();
    lcd.setCursor(8,0);
    lcd.print(pulse_time);
    lcd.setCursor(13,0);
    lcd.print("SET");
  }
}

int getEncoderTurn(void) {
  n = digitalRead(encoder0PinA);
  if ((encoder0PinALast == LOW) && (n == HIGH)) {
    if (digitalRead(encoder0PinB) == LOW) {
      encoder0Pos--;
    } else {
      encoder0Pos++;
    }
    //Serial.print (encoder0Pos);
    lcd.setCursor(8,0);
    lcd.print(encoder0Pos);
    lcd.print("           ");
    

  }
  encoder0PinALast = n;
  return encoder0Pos;
}
2

Is there a reason why you are not using one of the encoder libraries?

3

econjack:
Is there a reason why you are not using one of the encoder libraries?

I can certainly use. Please recommend one which can help me reach my needs.

Thanks.

4

If the encoder code you already have works to your satisfaction (make sure that it does), I see no reason to use a library.

What is your code supposed to do, and what does it do instead?

5

jremington:
If the encoder code you already have works to your satisfaction, I see no reason to use a library.

Hi jremington
My code doesn't yet do the job. Please see my first post.
I want to be able to change pulse and delay values using one encoder.

6

You will need to write code for that. If you want someone to do it for you, post in the Gigs & Collaborations section, and be prepared to pay.

If you want to write it yourself, consider using a state machine, using a status variable to determine where encoder input should be directed.

7

I will give it a try.
I will appreciate if anyone shares an example showing such application.